EP3835508A1 - Device for attaching an underroof insulation - Google Patents

Abstract

The invention relates to a hanger 2 for maintaining an insulation formed of an insulation 4 and a vapor barrier membrane 6, this hanger comprising a rod 10 passing through the insulation and the membrane, a washer 17 for supporting the insulation. 3 and a nozzle 18 forming with the washer a baffle which ensures free retention of the membrane so as to form a seal for the membrane around the rod 10.

Description

The present invention relates to the field of thermal or sound insulation and, more particularly, the thermal renovation of the home.

In order to thermally insulate a building, it is necessary to insulate the roof, which is generally done from the inside and makes it possible not to alter the exterior appearance of the building. The insulation includes a vapor barrier and / or air barrier membrane, generally disposed under a layer of insulating material, between this layer and the facing. The roof can be horizontal or sloping; the ceiling is generally horizontal. Such insulation can also be used on a vertical wall.

There are hangers that allow an insulation system to be suspended from an existing building frame. These hangers generally include means for fixing to the frame, support means for an insulation and fixing means for an interior covering which makes it possible to hide the insulation and the fixing. Such hangers are in particular known from the document EP 3,156,556 .

However, when it is implemented, such a hanger pierces the vapor barrier membrane, which requires means to restore the seal around the hanger. The implementation of such means requires the operator who is responsible for taking great precautions and time; under site conditions, this operation is not always well done. The membrane may in particular be weakened or injured and the seal may deteriorate over time.

According to the European standard EN 1931 and the Unified Technical Document DTU 31.2, a vapor membrane must have a resistance to the passage of steam (Sd) greater than 18m or 90m, as the case may be. Typically, a vapor barrier membrane is one to two millimeters thick.

In buildings with insulation with a vapor barrier, there are always leaks. One of the aims of the present invention is to ensure that the suspension system is not a weak link in the seal.

An object of the invention is to provide a part making it possible to easily attach an insulation and a facing to a structure of a building and ensure a satisfactory level of sealing of the vapor barrier membrane.

Another object of the invention is to provide such a part which avoids radial and / or axial pinching of the membrane in a position of use, such pinching running the risk of weakening or injuring the membrane.

• une tige qui comprend des moyens pour fixer la pièce, au moins indirectement, à la structure ;
• des moyens pour porter la garniture ;
• des moyens pour y fixer, au moins indirectement, le parement ; et,
• des moyens pour former une chicane autour de la tige afin d'y insérer la feuille.

To solve this problem, the invention provides a system for insulating a building, which comprises a lining of insulating material, a sheet and at least one part for fixing the lining, the sheet and a facing to a structure of a building, in particular to a roof, in particular a frame of this roof, this room comprising:

• a rod which comprises means for fixing the part, at least indirectly, to the structure;
• means for carrying the trim;
• means for fixing the facing therein, at least indirectly; and,
• means for forming a baffle around the stem in order to insert the leaf therein.

In a position of use, the baffle advantageously forms a longitudinal clearance and a radial clearance greater than the thickness of the sheet. These clearances are preferably between two and three times the thickness of the sheet.

• des moyens pour fixer la pièce, au moins indirectement, à la structure ;
• des moyens pour accrocher la rondelle sur la tige dans une position d'usage ; et,
• des moyens, pour solidariser l'embout avec la tige, dans la position d'usage ; la rondelle comprenant une collerette qui s'étend radialement et l'embout comprenant une coupelle, la collerette et la coupelle étant disposées de sorte que, dans la position d'usage, elles forment ensemble la chicane.

The part may further comprise a washer and a tip, the rod comprising successively, along a longitudinal axis:

• means for fixing the part, at least indirectly, to the structure;
• means for hooking the washer onto the rod in a position of use; and,
• means for securing the end piece with the rod, in the position of use; the washer comprising a flange which extends radially and the end piece comprising a cup, the flange and the cup being arranged so that, in the position of use, they together form the baffle.

Preferably, in the position of use, the collar is, at least partially, longitudinally housed in the cup.

Preferably, the collar comprises a peripheral edge and the cup comprises a peripheral wall having an upper edge, arranged so that, in the position of use of the baffle thus produced, the sheet forms a zone in contact with one face of the flange and a zone in contact with the lining, these two zones being substantially parallel to each other and connected by two folds of opposite curvature framing a frustoconical zone. Advantageously, the frustoconical zone forms with the axis of the part an angle of between ten and eighty degrees. Preferably, the angle is between thirty to forty-five degrees.

The washer and / or the end piece can form the support for the lining.

Advantageously, the baffle forms a free retention of the sheet by the part. The sheet is preferably slidably engaged against the face of the collar.

The sheet can be a membrane, for example a vapor barrier membrane, independent of the lining, or be a patch cooperating with a surface coating of the lining.

• fourniture d'au moins une pièce ;
• fixation de la tige de chaque pièce à la structure ;
• embrochage de l'isolant sur les tiges ;
• fixation d'une rondelle sur au moins une des tiges ;
• embrochage de la feuille sur au moins une des tiges sous la rondelle ; et,
• fixation d'un embout sur au moins une des tiges,
  de préférence, de sorte que la feuille est maintenue de façon mobile entre l'au moins une rondelle et l'au moins un embout.

The invention also relates to an isolation method using a system according to the invention which comprises the following steps:

• supply of at least one part;
• fixing the rod of each part to the structure;
• plugging in the insulation on the rods;
• fixing a washer on at least one of the rods;
• plugging of the sheet on at least one of the stems under the washer; and,
• attachment of a tip to at least one of the rods,
  preferably, so that the sheet is movably held between the at least one washer and the at least one end cap.

• une tige qui comprend des moyens pour fixer la pièce, au moins indirectement, à la structure ;
• des moyens pour porter la garniture ;
• des moyens pour y fixer, au moins indirectement, le parement ; et,
• des moyens pour former une chicane autour de la tige afin d'y insérer la feuille.

The invention also relates to a part for forming a system according to the invention, comprising:

• a rod which comprises means for fixing the part, at least indirectly, to the structure;
• means for carrying the trim;
• means for fixing the facing therein, at least indirectly; and,
• means for forming a baffle around the stem in order to insert the leaf therein.

A part, a system or a method according to the invention can be used for thermal insulation and / or for sound insulation, in particular.

• [Fig. 1] est une vue illustrant un système selon l'invention pour isoler un bâtiment, à laquelle une pièce selon l'invention est représentée verticalement selon son extension longitudinale ;
• [Fig. 2] est une vue éclatée de la pièce de la figure 1, représentée isolément ;
• [Fig. 3] est une vue en coupe partielle d'une extrémité distale de la pièce, à l'endroit où elle est en prise avec une membrane d'étanchéité du système de la figure 1 ;
• [Fig. 4] est une demi-coupe partielle similaire à la coupe de la figure 3, représentant une position de la membrane lorsque la pression à l'intérieur est supérieure à la pression à l'extérieur du bâtiment ;
• [Fig. 5] est une demi-coupe partielle similaire à la coupe de la figure 4, représentant une position de la membrane lorsque la pression à l'extérieur est supérieure à la pression à l'intérieur du bâtiment ;
• [Fig. 6] est une demi-coupe partielle similaire à celle des figures 3 et 4, illustrant un deuxième mode de réalisation pour une pièce selon l'invention ; et,
• [Fig. 7] est une demi-coupe partielle, illustrant schématiquement la chicane pour une pièce selon le mode de réalisation des figures 1 à 5 et correspond à un agrandissement de la zone repérée VII à la figure 3.

Several embodiments of the invention will be described below, by way of nonlimiting examples, with reference to the appended drawings in which:

• [ Fig. 1 ] is a view illustrating a system according to the invention for insulating a building, in which a room according to the invention is shown vertically along its longitudinal extension;
• [ Fig. 2 ] is an exploded view of the part of the figure 1 , shown in isolation;
• [ Fig. 3 ] is a partial cross-sectional view of a distal end of the part, where it engages a waterproofing membrane of the system. figure 1 ;
• [ Fig. 4 ] is a partial half cut similar to the cut of the figure 3 , representing a position of the membrane when the pressure inside is greater than the pressure outside the building;
• [ Fig. 5 ] is a partial half cut similar to the cut of the figure 4 , representing a position of the membrane when the pressure outside is greater than the pressure inside the building;
• [ Fig. 6 ] is a partial half cut similar to that of figures 3 and 4 , illustrating a second embodiment for a part according to the invention; and,
• [ Fig. 7 ] is a partial half-section, schematically illustrating the baffle for a part according to the embodiment of figures 1 to 5 and corresponds to an enlargement of the area marked VII at the figure 3 .

The terms high and low, in particular, refer to the layout of the figure 1 , without this being limiting.

The figure 1 illustrates a system 1 according to the invention for thermal insulation under the roof of a building. The system comprises parts according to the invention, hereinafter referred to as hangers 2, which make it possible to fix the system to a frame 3.

In the example illustrated, in addition to the hanger 2, the thermal insulation system 1 comprises a lining of insulating material 4, here thermally insulating, a membrane 6 and a facing 7.

In the example illustrated, the lining 4 comprises a single layer of fibrous insulating material such as mineral wool. The membrane 6 is a vapor barrier membrane independent of the insulating material, of substantially constant thickness E6. The facing is a plasterboard.

• des moyens 11 pour fixer la suspente à la charpente ;
• une allonge 12, solidaire des moyens de fixation 11, sensiblement cylindrique et lisse, s'étendant depuis les moyens de fixation 1 selon l'axe longitudinal X2;
• des moyens d'accrochage 13, disposés dans le prolongement axial de l'allonge ;
• une portion intermédiaire 14, disposée dans le prolongement axial des moyens d'accrochage ;
• une portion filetée 15, disposée dans le prolongement axial de la portion intermédiaire ; et,
• une pointe 16, disposée dans le prolongement axial de la portion filetée.

To the figure 1 , a single hanger 2 is shown, in the use position. It has a longitudinal axis X2, arranged vertically. To the figure 2 , it is shown in more detail and in isolation, its components being separated from each other. The illustrated hanger comprises a rod 10, this rod comprising, from top to bottom:

• means 11 for fixing the hanger to the frame;
• an extension 12, integral with the fixing means 11, substantially cylindrical and smooth, extending from the fixing means 1 along the longitudinal axis X2;
• hooking means 13, arranged in the axial extension of the extension;
• an intermediate portion 14, arranged in the axial extension of the hooking means;
• a threaded portion 15, arranged in the axial extension of the intermediate portion; and,
• a point 16, arranged in the axial extension of the threaded portion.

In the example illustrated, the fixing means 11, the extension 12, the hooking means 13, the intermediate portion 14, the threaded portion 15 and the tip 16 are formed in one piece. The extension 12, the hooking means 13, the intermediate portion 14, the threaded portion 15 and the point 16, are coaxial and substantially symmetrical in rotation about the longitudinal axis X2.

The hanger further comprises a washer 17 and a tip 18, both of which can be removably connected to the rod 10.

The figures 1 and 3 illustrate the hanger 2 in a position of use, in which the washer and the end piece are fixed to the rod 10.

To the figure 1 , a single hanger 2 is shown, vertically, fixed to a beam 3 of the frame. The insulator 4 is plugged into the extension 12 and rests on the washer 17 and / or the end piece 18. The membrane 6 is plugged into the rod, between the washer and the end piece. The facing 7 is suspended from the end piece 18 by means of a fur 8. The facing 7 is fixed to the fur 8, for example by screwing, and the fur 8 is snap-fastened to the end piece 18. This fur complies with the French standard NF, in particular with the Unified Technical Document DTU 25.41.

The extension 12 has a constant diameter D12. The hooking means 13 form a cylindrical zone 21 of diameter D21 greater than the diameter D12 of the extension 12. The hooking means further comprise four studs 22 regularly distributed around the axis X2 and extending radially from the cylindrical zone 21.

The threaded portion 15 has a core of diameter D15 smaller than the diameter D12 of the extension.

The intermediate portion 14 comprises a cylindrical zone of the same diameter D15 as the core of the threaded portion 15. It further comprises a stop 24.

The point is conical, it is directed downwards and extends downwards from the core of the threaded area; its largest diameter is equal to the diameter D15 of the core.

The washer 17 comprises a sleeve 26. Four hooks 27 are formed in an upper edge of the sleeve 26. The hooks 27 are provided to engage with the studs 22 of the hooking means 13, by snap-fastening. The washer 17 also includes an annular flange 28, extending radially from a lower edge of the sleeve 26.

The end piece 18 comprises a cup 31, a neck 32 and a socket 33, the neck interconnecting the socket and the cup. The cup comprises a bottom 34 in the form of a radial plate 34 and a substantially cylindrical peripheral wall 35 extending upwards from a peripheral edge of the plate 34. The neck extends downwards from the bottom 34. An internal thread 36 is formed in the neck, in a bore which opens out through an orifice 37 through the bottom 34. A counter-stop 38, which extends towards the axis X2, is formed inside the orifice. The tapping is designed to be screwed onto the threaded portion 15. The counter-stop 38 is designed to abut against the stop 24, so that it limits screwing. The wall 35 comprises an external knurling 39, which facilitates the handling of the end piece and its screwing.

In the position of use, that is to say when the end piece 18 is fully screwed onto the rod 12, that is to say when the stop 34 is in contact with the counter stop 38, the washer 17 is, at least partially, longitudinally housed in the cup 31. In this position, there is a longitudinal clearance J1 between the flange 28 and the bottom 34 and a radial clearance J2 between a peripheral edge 28B of the flange 28 and the wall 35. Clearances J1, J2, both of which are larger than the thickness E6 of membrane 6.

The socket 33 forms a bulge provided with a peripheral groove 41. The groove 41 is open radially so as to be able to accommodate therein, by snap-fastening, the opposing entering edges 42 of the sleeve 8, as illustrated in FIG. figure 1 .

• fixation de tiges 10 à la charpente 3 ;
• embrochage de l'isolant 4 sur les tiges 10 ; et,
• fixation de rondelles 17 sur les moyens d'accrochage 13 de chacune des tiges 10.

As shown in figure 2 , an insulation method using hangers 2 according to the invention comprises the following steps:

• fixing rods 10 to the frame 3;
• plugging in the insulator 4 on the rods 10; and,
• fixing washers 17 on the hooking means 13 of each of the rods 10.

In this position, the insulation rests, without the aid of an operator, on the flanges 28.

• embrochage de la membrane 6 sur la tige 10, sous la rondelle ; et,
• vissage de l'embout 18 sur la tige 10.

The isolation process then comprises the following steps:

• plugging in the membrane 6 on the rod 10, under the washer; and,
• screwing the end piece 18 onto the rod 10.

In this position, the washer 17 and the end piece 18 form between them a baffle 100 for the membrane 6. Thus, the membrane is held between an upper edge of the wall 35 and a peripheral edge of the flange 28, and the membrane is pressed against a lower face of this collar. Thus, airtightness is ensured where the rod passes through the membrane.

The figure 7 illustrates a position of the membrane 6 in the baffle 100 and in the vicinity of this baffle.

The dimension of the clearances J1, J2, greater than the thickness E6 of the membrane, prevents this membrane from being pinched between the washer 17 and the end piece 18. This prevents the creation of a rupture initiation or tearing of the membrane. membrane, likely to affect the durability of this seal.

As particularly illustrated in the figure 7 , the membrane 6 is deformed when passing the baffle 100. The membrane 6 comprises several annular zones formed around the axis X of the hanger 2. Moving away from the axis X2, there are mainly five zones 61-65.

A first flat zone 61 and perpendicular to the axis X2 is in contact with a lower face 28A of the collar 28. The first zone extends from and around a hole 60 formed in the membrane by the piercing of the point 16. of the hanger, up to a peripheral edge 28B of the collar.

A second zone 62, curved in the plane of the figure 7 , rolls up against the rounded peripheral edge 28B, and forms a connection between the first zone 61 and a third zone 63. The third zone 63 is frustoconical and forms, in the plane of the figure, an angle A6 with the axis X2 of the line. It is noted that, due to the clearances J1 and J2, the angle A6 is non-zero and, in the example illustrated, close to sixty degrees. Preferably, the system 1 is designed so that the angle A6 is between ten and eighty degrees of angle, still more preferably between thirty and forty-five degrees.

A fourth zone 64, curved in the plane of the figure 6 , the cup 31 rests on an upper peripheral edge 35A of the peripheral wall 35. It forms a connection between the third zone 63 and the fifth zone 65. Beyond this fourth zone 64, in the fifth zone 65, the membrane 6 is pressed against an underside 4A of the lining 4. Thus, in the fifth zone, the membrane is essentially flat and parallel to the same membrane in the first zone 61.

It is noted that the second zone 62 and the fourth zone 64 each form a fold, the curvatures of one having a sign opposite to the curvatures of the other. The frustoconical zone 63 makes it possible to create a local tension in the membrane, which ensures its free retention against at least one of the edges 28B, 35A of the hanger. By free retention it should be understood that no adhesive is used and that the membrane can move transversely to the axis X2 of the hanger 2, which prevents tearing of the membrane in the event of a transverse force, in particular during the implementation of the system 1.

Thus, in the position of use of the baffle 100, the membrane forms a zone 61 in contact with a face 28A of the flange 28, a zone 65 in contact with the lining 4, these two zones 61, 65 being substantially parallel between they and connected by two folds 62,64 of opposite curvatures framing a frustoconical zone 63.

Preferably, the orifice 37 of the end piece 18 has a diameter greater than the diameter D15 of the core, sufficient to prevent the membrane from getting stuck there, where it has been torn by the passage of the rod 10.

In the example illustrated in the figures, the end piece 12 comprises a second thread 43 coaxial with the first thread 36, of diameter greater than the first. The first thread opens into the second and the second thread opens at the bottom to the lower surface of the socket 33. The second thread is provided for fixing an accessory therein, not shown in the figures.

The presence of a neck 32 on the end piece 18 makes it possible to increase the space 44 between the membrane 6 and the covering 7; this space can thus be used for the passage of cables, for example for lighting.

The figures 4 and 5 are an enlarged view similar to the figure 3 , of which only the right side is shown. In these figures, the washer 17 is only partially longitudinally nested in the cup 31, so that the insulator 4 rests directly on the washer.

The figure 4 represents a position taken by the membrane 6 when the pressure inside N of the insulated building is greater than the pressure outside E of this building. In this position, the membrane 6 is pressed under the washer 17, and has no direct contact with the cup 31. The seal is achieved by the contact between the membrane and the washer.

The figure 5 represents a position taken by the membrane 6 when the pressure inside N of the insulated building is lower than the pressure outside E of this building. In this position, the membrane 6 is pressed inside and against the cup 31, and has no direct contact with the washer 17. The seal is achieved by the contact between the membrane and the cup.

The figure 6 is similar to figures 4 and 5 , except in that it illustrates a second embodiment. This second embodiment will be described in that it differs from the first, previously described with reference to figures 3 to 5 and 7 .

In this second embodiment, the washer 17 comprises a cup 51, the concavity of which is oriented downwards and the end piece 18 comprises an annular flange 52 provided to fit axially in the cup 51. Thus nested, the flange 52 and the cup 51 forms a baffle for the membrane 6.

The arrangement is therefore substantially reversed with respect to the first embodiment. This arrangement makes it possible to rest the insulator 4 on an upper face of the cup 51 which has a larger seating surface than that of the collar 17 in the first embodiment.

In each of the embodiments described for a system 1 according to the invention, the width of the longitudinal clearance J1 and the width of the radial clearance J2 are one, the other, or, preferably both, between two and three. times the thickness E6 of the membrane.

Of course, the invention is not limited to the examples which have just been described. On the contrary, the invention is defined by the following claims.

It will indeed appear to those skilled in the art that various modifications can be made to the embodiments described above, in the light of the teaching which has just been disclosed to him.

Thus, the tip may not include a neck. Also, the tip may not be mounted on the rod by screwing. It can be mounted there by axial translation and snap-fitting.

In addition, a hanger according to the invention is not limited to sealing a vapor barrier membrane. Thus, another type of sheet can be introduced between the washer and the end piece. This may be the case with a sealing connector, of the patch type and generally referred to as a “patch”, cooperating with a surface coating of the sealing gasket where it is crossed by the rod of the hanger.

In the examples described above, the membrane is provided independently of the lining of insulating material; this is for example the case of the insulation system referenced "RT Max" available in the catalog of the Knauf Insulation Company, 55 rue Aristide Briand in 92300 Levallois-Perret, France. Of course, a hanger according to the invention can also be used with insulation in which a vapor barrier coating is provided in one piece with the lining of insulating material; this is for example the case of the insulation referenced "RT Plus" available in the catalog of the Knauf Insulation Company, 55 rue Aristide Briand in 92300 Levallois-Perret, France.

A hanger according to the invention can also be used without a membrane.

Claims (14)

System (1) for insulating a building, characterized in that it comprises a lining (4) of insulating material, a sheet (6) and at least one part (2) for fixing said lining, said sheet and a facing (7 ) a structure (3) of a building, in particular a roof, in particular a frame (3) of this roof, each room comprising: - a rod (10) which comprises means (11) for fixing the part, at least indirectly, to said structure (3); - means (17, 18) for carrying the lining; - Means (18) for fixing therein, at least indirectly, said facing; and, - Means (28, 31; 51, 52) for forming a baffle (100) around said rod in order to insert therein, where appropriate, said sheet (6). System according to Claim 1, characterized in that in a position of use the baffle (100) forms a longitudinal play (J1) and a radial play (2) greater than the thickness of the sheet (6). System according to Claim 2, characterized in that the clearances (J1, J2) are between two and three times the thickness of the sheet (6). System according to one of claims 1 to 3, characterized in that the part (2) further comprises a washer (17) and an end piece (18), the rod comprising successively, along a longitudinal axis (X2): - means (11) for fixing the part, at least indirectly, to the structure; - Means for hooking (13) said washer (17) on the rod in a position of use; and, - Means (15) for securing said end piece (18) with the rod, in the position of use;
the washer comprising a flange (28, 52) which extends radially and the end piece comprising a cup (31, 51), said flange and said cup being arranged so that, in the position of use, they together form the baffle (100). System according to Claim 4, characterized in that , in the position of use, the collar is, at least partially, longitudinally housed in the cup. System according to one of Claims 4 and 5, characterized in that the collar (28) comprises a peripheral edge (28B) and in that the cup (31,35) comprises a peripheral wall (35) having an upper edge ( 35A), arranged so that, in the position of use of the baffle (100) thus produced, the sheet forms a zone (61) in contact with a face (28A) of the collar (28) and a zone (65 ) in contact with the lining (4), these two zones (61,65) being substantially parallel to each other and connected by two folds (62,64) of opposite curvatures surrounding a frustoconical zone (63). System according to Claim 6, characterized in that the frustoconical zone (63) forms with the axis (X2) of the part (2) an angle (A6) of between ten and eighty degrees. System according to Claim 7, characterized in that the angle (A6) is between thirty of forty-five degrees. System according to one of Claims 4 to 8, characterized in that the washer and / or the end piece form the support (17, 18) for the lining. System according to one of Claims 1 to 9, characterized in that the baffle (100) forms a free retention of the sheet by the part (2). System according to one of Claims 1 to 10, characterized in that the sheet is a membrane (6), for example a vapor barrier membrane independent of the lining (4). System according to one of Claims 1 to 10, characterized in that the sheet is a patch cooperating with a surface coating of the lining (4). Insulation method using a system according to claim 12, characterized in that it comprises the following steps: - fixing the rod (10) of each part (2) to the structure (3); - plugging in the insulation (4) on the rods (10); - fixing a washer (17) on at least one of the rods (10); - plugging of the sheet (6) on at least one of the rods (10) under the washer; and, - fixing an end piece (18) on at least one of the rods (10),
preferably, so that the sheet is held movably between said at least one washer and said at least one end piece. Part (2) for forming a system according to one of claims 1 to 12 comprising: - a rod (10) which comprises means (11) for fixing the part, at least indirectly, to said structure (3); - means (17, 18) for carrying the lining; - Means (18) for fixing therein, at least indirectly, said facing; and, - Means (28, 31; 51, 52) for forming a baffle (100) around said rod in order to insert said sheet (6) therein.

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